Comparison

Chum vs OshiDiary

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Chum

Features
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チェキの枚数管理も、推しとの会話の記録も、これひとつで。 Chumは、特典会で撮ったチェキと、そのとき交わした会話をまとめて残せる推し活アプリです。完全無料・登録不要で、データは端末の中だけに保存されます。 ■ こんな方におすすめ ・特典会で推しと話した内容を忘れたくない ・推しごとに、チェキを何枚撮ったか把握したい ・いつ・どこのライブで撮ったか記録しておきたい ・チェキをアルバムのように見返したい ■ できること 【チェキを管理する】 写真・撮影日・場所・メモを添えてチェキを保存。推しごと・日付順に一覧で見返せます。 【枚数を自動で集計】 総チェキ数と、誰と何枚撮ったかの推しランキングをホーム画面でひと目で確認できます。 【推しとの会話を記録する】 特典会や握手会で交わした会話を、トーク画面風に記録。チェキに紐づけても、会話だけで残してもOK。 【会話を1枚の画像でシェア】 記録した会話をきれいな1枚の画像にして、SNSへそのまま投稿できます。 ■ 安心して使える ・チェキや会話などの思い出データはすべて端末内に保存 ・アカウント登録・ログイン不要 ・広告なし・完全無料 推し活をもっと楽しく、もっと大切に。 Chumで、推しとの思い出をチェキと会話ごと残しましょう。

About

OshiDiary

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Ever looked through your growing collection of cheki photos and wondered, “When did I take this one?” “What did I talk about with my oshi that day?” OshiDiary is an app for saving your cheki digitally and keeping track of the memories you’ve made with your oshi. Your cheki, event memories, and spending records — keep your entire oshi journey together in one place. 【Build Your Digital Cheki Collection】 Save your cheki digitally and create your own personal collection. Record the date and signature details for each cheki, so you can easily look back on every memory with your oshi anytime. 【Remember Every Event】 The live show may be over, but the memories don’t have to disappear. Write down what happened, how you felt, and the conversations you had with your oshi. Come back later and relive those special moments all over again. 【Track Your Oshi Activities】 How many times did you see your oshi this year? How many cheki did you take? How much have you spent supporting them? OshiDiary automatically organizes your monthly and yearly records, helping you see your oshi activities through both memories and numbers. 【Manage Multiple Oshis】 Whether you support one oshi or many, OshiDiary makes it easy to keep everything organized. Create a dedicated page for each oshi and keep their cheki, memories, and records separate. Perfect for idols, underground idols, concept cafés, and all kinds of oshi activities. Save the cheki. Keep the memories that came with them. Start building your own oshi diary with OshiDiary. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Chum4 screens
OshiDiary4 screens

Verdict

The call

The clearest difference is in-app purchases: Chum at none against OshiDiary's 2. OshiDiary's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. OshiDiary sells 2 in-app purchases, starting at $4.99 per month. Chum asks for nothing beyond the download.

UpkeepUpdate frequency

Chum ships an update every 2 months, OshiDiary every 2 weeks. The most recent releases landed on October 12, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 4 level
Chum versus OshiDiary: the parameters behind the verdict, then further details
ParameterChumOshiDiary
PriceFreeFree
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhoneiPhone
Requires iOS18.518.0 — better
Further details — not scored
Size20 MB35 MB
Age rating4+17+
DeveloperKota SakuraiYU FANG

In-app purchases

None

Chum

No in-app purchases

2 purchases

OshiDiary

Subscriptions2
  • Monthly Plan14 Days trial$4.991 Month
  • Annual Plan14 Days trial$19.991 Year

Questions

Is Chum free?
Chum is free to download, with no in-app purchases.
Is OshiDiary free?
OshiDiary is free to download, with in-app purchases available.
Do Chum or OshiDiary have ads?
Neither Chum nor OshiDiary shows ads.
Which is updated more often, Chum or OshiDiary?
Chum ships an update every 2 months, and OshiDiary every 2 weeks. Most recently, Chum was updated on October 12, 2026 and OshiDiary on October 9, 2026.

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